Electric lamp socket



Feb. 23, 1932. J. TAUSSIG ELECTRIC LAMP SOCKET Filed Dec. 15, 1929 2 Sheets-Sheet l M21102"; 705 6/172 ZZ:

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ELECTRIC LAMP SOCKET Filed Dec. 1-3, 1929 2 Sheets-Sheet 2 i Illl 7 70 gvkj 5g,

duzwzw Patented Feb. 23, 1932 UNITED STATES JOSEPH. TA'USSIG, .OF CHICAGO, ILLINOIS, ASSIGNOR TO REFLECTOR HARDWARE COR- PORATION, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS EIlECTRIG LAMP SOCKET Application filed December 13, 1929-. Serial. No..413,730.

socket with the lead wires. Another object of this inventionis to provide connectionsrbetween the lead wires andthe screw shell. and center contact piece of the lamp socket con tained entirely within the confines of the s lamp socket. Another object is to provide a simple and-highly efficient, yet comparatively inexpensive, lamp socket which may be quick ly and easily installed and connected .with the load wires. Another object is to provide i a housing composed of two sections,whereby the interior parts may be readily assembled and installed in the housing.

The invention further consists in the several' novel features of construction, arrangement and combination of parts hereinafter fully set forth and claimed.

The invention is clearly illustrated lnthe drawings accompanying this specificatlon 1n which Figure 1 is an end elevation of a showcase reflector equipped with an electric lamp socket embodying a simple form of the pres ent invention;

Fig. 2 is a. side elevation thereof looking in the direction ofthe arr-W2 in Fig. 1 with a certain channel member removed to show parts that would otherwise have been hidden from view;

Fig. 3 is a view partly in plan and partly in horizontal section of the parts seen in Figs.

1 and 2, the line of section being indicated at 3-3 in Fig. 1; 1

Fig.4 is a detail vertical cross section taken on. the broken line 47- 1 of Fig. 3;

Fig. 5 is a perspective view of the complete socket;

Fig. 6 is a plan of the two sections of the socket separated and laid out parallel with each other;

Fig. 7 is an end elevation-of the two sectionsseparated from each other; and

Fig. 8 is a detail vertical cross sectiontaken on the line 8-8 of Figs. 1 and 3.

Referring to said drawings, the reference character 10-designates a showcase reflector of conventional form, to the back of which is secured the usual channel member 11 by bolts and nuts 12 (see Fig. 3). Thechannel member 11 and wall 13 of the reflector form a channel for the reception of the lead wires 14 and 15. The lainp socket forming the subject matter of this specification-is shown at A and is adapted to support anincandescent electric lamp B (see Fig. 3) inithe hollow of the reflector and. parallel with the walls thereof.

The housing 16 of the lamp socket is formed of two companion halves 17 and 18 formed of porcelain or other non-conducting material and secured together by a screw 19 which extends through holes formed in the two sections 17 and 18andis provided with a nut 20 nponits threaded end. The head of the screw and the nut are contained in countersinks formed in the two sections 17 and 18. To properly locate the two sections with respect to each other and to prevent any relative movement between them after they have been secured in place, notches 17 and 17 may be provided inthe section 17, and lugs 18 and 18 may be provided in the section 18 for engagement in said notches.

Each section 17 and 18 is formed with the semi-cylindrical part 21 and 22 which, when brought together, form a cylindrical chambered part for the reception of the screw shell 23 and the center contact piece 24. Extending laterally from the semi-cylindrical parts 21 and 22 of the housing are base members 25 and 26 which may be rectangular in form, as illustrated, and are formed with flat end faces 27 (see Fig. 5) which are arranged to seat against the inner face of the reflector wall 13.

The base members 25 and 26 are formed with screw holes 28 and 29 for the reception of screws 30 and 31 which extend through the Wall 13 of the reflector and through said screw holes and havenuts32 and 33 threaded upon their ends. The nut 32 is contained in a recess formed in the side of the base member 25 and the nut 33 is contained in a notch in the base member 26. It will be evident that the lamp socket may be readily secured to the Wall 13 of the reflector by tightening up the screws 30 and 31. Projecting fromthe flat seating faces 27 of the base members are grooved lugs 34and 35 which are adapted to extend through a rectangular opening 36 (see Fig. 2) formed in the wall 13 of the reflector. The grooves in said lugs extend parallel with the reflector and receive the lead wires 14 and 15. It is to be noted that the base member extends at rightangles to the cylindrical chamber and that the seating face extends in a plane parallel with the axis of said chamber.

The contiguous faces of the two sections 17 and 18 of the housing are formed with open channels 38 and 39 (see Fig. 6) which lead from the grooves of the lugs 34 and 35 to places behind the bottom of the chamber in which the screw shell and center contact piece are contained. In said channels are secured two metal strips 40 and 40 (preferably formed of brass) which are bent up to conform roughly to the shape of the channels. The metal strip 40 and screw shell 23 are secured together by screws 41 which extend through the base 23 of the screw shell and the body of the housing section 18 and pro vide the electrical connection between the screw shell and the metal strip 40*.

The metal strip 40 is secured to the center contact piece 24 by a screw 42 which extends through the base 24 of the center contact piece and the body of the housing section 17,

and said screw forms the electrical connection between the metal strip 40 and center contact piece 2'4. The screws 41 and 42 also serve to secure the screw shell and center contact piece in place in the chamber of the housing. In order to properly locate. the center contact piece with respect to the screw shell, the sections 17 and 18 are provided with ribs 43 and 44 at the bottom of the chamber between which ribs the base portion 24 of the center contact piece 24 is held by the screw 42.

Th metal strips 40 and 40 lead from the screws 42 and 41 to the grooves in the lugs 34 and 35 where they are provided with end portions 45 and 46 that are bent at right angles to the length of the metal strips and receive binding screws 47 and 48 which serve to con nect the lead wires 14 and 15 to the metal strips 40 and 40. At places adjacent the binding screws 47 and 48, th lead wires are stripped to expose the copper wires, and the latter are fastened between the end portions 45 and 46 of the metal strips 40 and 40 and the heads of the binding screws 47 and 48.

The housing being made in two sections, the screw shell 23, center contact piece 24 and metal strips 40 and 40 may be placed in their respective chambers and channels and secured in place by the screws 41 and 42 after which the two sections are brought together and fastened together by the bolt 19 and nut 20. The metal strips 40 and 40 are insulated from each other by the body of the housing.

To install the lamp socket in place, the grooved lugs 34 and 35 are inserted through the opening 36 in the wall13 of the object to which the lamp socket is to be attached bringing the seating face 27 of the base member against the inner face of the wall 13, and the socket fastened to the wall by the bolts 30 and 31 and nuts 32 and 33. The lead wires 14 and 15 are then bared at places adjacent the binding screws 47 and 48 and inserted between the heads of the binding screws and the ends 45 and 46 of the metal strips 40 and 40 and the binding screws screwed down, thereby connecting the lead wires to the socket.

From the above it is apparent that the parts may be readily assembled and that the electrical connections are completely insulated. Furthermore, the electrical connections between the socket and lead wires are made within the confines of the socket itself and without the necessity of making any soldered joints. V

I claim as new, and desire to secure by Letters Patent:

1. An electric lamp socket comprising a two part housing composed of non-conducting material and comprising two companion sections placed face to face and formed with complementary semi-circular recesses to provide a cylindrical screw shell holding portion, themeeting faces of said sections being also formed with non-regist'erin g grooves providing channels for current conducting ele ments, a screw shell secured in the recess of one section, a center contact piece secured in the recess of the other section, and current conducting elements, one contained in each groove and one in electrical contact with the screw shell and the other in electrical contact withthe center contact piece.

2. An electric lamp socket comprising a two part housing composed of non-conducting material and comprising two companion sections placed face to face and formed with lid complementary semi-cylindrical recesses to provide a cylindrical screw shell holding portion, the meeting faces of said sections being also formed with non-registering grooves providing channels for electric contacting elements. said housing being further provided with a seating face paralleling the axis of the screw shell holding portion, current conduct ing elements extending through said grooves from said seating face to places adjacent the bottom of the recesses, a screw shell secured in the recess of one section and electrically connected with the current conducting element contained in said section, and a center contact piece secured in the recess of the other section and electrically connected with. the current conducting element in the last men tioned section.

3. An electric lamp socket comprising a housing composed of non-conducting material formed of two companion sections, each provided with a semi-cylindrical part at one end, a transversely extending base part at the other end formed with a flat seating face and a grooved lug projecting therefrom, there being channel in each section leading from the grooved lug, means for securing said two sections together with the two semi-cylindrical parts forming a cylindrical chambered portion, a screw shell and a center contact piece secured in said chambered portion, and electric conductors running from said screw shell and center contact piece through said channels and terminating at the grooves in the lugs.

4t. An electric lamp socket comprising a housing composed of non-conducting material and formed of two companion sections, each section having a semi-cylindrical part at one end and a transversely extending base part at the other end provided with a flat seating face and grooved lugs projecting therefrom, there being an open sided channel in each section leading inwardly from the groove in the 111 and closed by the wall of the other section, means for securing the two sections together with the semi-cylindrical parts forming a cylindrical chamber, a screw shell in said chamber and secured to one of said sections, a center contact piece in said chamber and secured to the other section, and electric conductors leading through said channels from said screw shell and center contact piece and terminating at the grooves in the lugs.

5. An electric lamp socket comprising a housing composed of non-conducting material and formed of two companion sections, each section having a semi-cylindrical part at one end and a transversely ext-ending base member at the other end provided with a flat seating face and grooved lugs projecting therefrom, there being an open sided channel in each section leading inwardly from the groove in the grooved lug and closed by the wall of the other section, means for securing the two sections together with the semicylindrical parts forming a cylindrical chamber, a screw shell and a center contact piece in said chamber, metal strips forming electrical conductors extending through said channels and terminating in the grooves of the lugs, fastening means extending through the body of said screw shell and one of the metal strips, and other fastening means extending through the center contact piece and the other metal strip, said fastening means operating to secure the screw shell, center contact piece and metal strips to the housing and serving also as electrical conductors.

6. An electric lamp socket comprising a housing composed of non-conducting material and formed of two companion sections joined together along a plane extending longitudinally through the housing, each section being formed with a semi-cylindrical part at one end co-operating with the semicylindrical part of the other section to provide a cylindrical chamber, and each section being further provided with a transversely extending base member having a flat seating face from which projects a grooved lug, the grooves of the two lugs extending parallel with each other, and there being an open sided channel extending inwardly from said grooves and each closed by the adjacentwalls of the opposite section, a screw shell contained in the chamber and secured to one section, a center contact piece contained in the chamber and secured to the other section, and metal strips forming electrical conductors extending from the grooves of the lugs through said channels with their inner ends secured to and in electrical contact with the screw shell and center contact piece respectively.

7. In an electric lamp socket, a housing composed of non-conducting material and formed of two companion sections arranged to be secured together, each section being formed at one end with a semi-cylindrical cavity, the one forming with the other a cylindrical chamber for the reception of a screw shell and a center contact piece, and each section being formed at the other end with a base member formed with a flat seating face, there being a grooved lug projecting from each seating face adapted for the reception of a lead wire, and there being a channel extending inwardly from each groove adapted for the reception of an electrical conductor, and means for securing said sections together.

8. In an electric lamp socket, a housing composed of non-conducting material and formed of two companion sections held face to face, each section being formed at one end with a semi-cylindrical part and at the other end with a base member formed with a flat seating face from which projects a grooved lug adapted for the reception of a lead wire,

a screw shell and a center contact piece secured in the chamber formed by the two semicylindrical parts, metal strips forming electrical conductors, one secured to the screw shell and one to the center contact piece and extending through channels in the meeting faces of the two sections and terminating in end portions at the grooves of the lugs, and binding screws threaded into said ends and adapted to fasten lead wires to said metal strips.

JOSEPH TAUSSIG. 

